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A man walks past a billboard by pro-European movement Britain for Europe depicting former UK Independence party leader Nigel Farage outside the Supreme court building in London on the first day of a four-day hearing on December 5, 2016.
The government of Prime Minister Theresa May will today seek to overturn a ruling that it must obtain parliamentary approval before triggering Brexit, in a highly-charged case in Britain's highest court. / AFP PHOTO / BEN STANSALLBEN STANSALL/AFP/Getty Images